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import QtQuick 2.0
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import QtQuick.Layouts 1.1
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import org.kde.plasma.core 2.0 as PlasmaCore
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import org.kde.plasma.components 2.0 as PlasmaComponents
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import org.kde.kquickcontrolsaddons 2.0
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import org.kde.kwin 2.0 as KWin
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// https://techbase.kde.org/Development/Tutorials/KWin/WindowSwitcher
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// https://github.com/KDE/kwin/blob/master/tabbox/switcheritem.h
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// https://github.com/KDE/kwin/blob/5baf75d11eda7ac4a3910a02544fd9cd64d9a2b2/tabbox/tabboxhandler.cpp#L230
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// https://github.com/KDE/kwin/blob/5baf75d11eda7ac4a3910a02544fd9cd64d9a2b2/tabbox/tabboxhandler.cpp#L325
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KWin.Switcher {
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id: tabBox
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currentIndex: thumbnailGridView.currentIndex
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PlasmaCore.Dialog {
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id: dialog
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location: PlasmaCore.Types.Floating
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visible: tabBox.visible
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flags: Qt.X11BypassWindowManagerHint
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x: tabBox.screenGeometry.x + tabBox.screenGeometry.width * 0.5 - dialogMainItem.width * 0.5
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y: tabBox.screenGeometry.y + tabBox.screenGeometry.height * 0.5 - dialogMainItem.height * 0.5
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onVisibleChanged: {
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if (visible) {
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dialogMainItem.calculateColumnCount();
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} else {
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thumbnailGridView.highCount = 0;
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}
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}
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mainItem: Item {
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id: dialogMainItem
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focus: true
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property int maxWidth: tabBox.screenGeometry.width * 0.9
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property int maxHeight: tabBox.screenGeometry.height * 0.7
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property real screenFactor: tabBox.screenGeometry.width / tabBox.screenGeometry.height
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property int maxGridColumnsByWidth: Math.floor(maxWidth / thumbnailGridView.cellWidth)
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property int gridColumns: maxGridColumnsByWidth
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property int gridRows: Math.ceil(thumbnailGridView.count / gridColumns)
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property int optimalWidth: thumbnailGridView.cellWidth * gridColumns
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property int optimalHeight: thumbnailGridView.cellHeight * gridRows
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property bool canStretchX: false
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property bool canStretchY: false
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width: Math.min(Math.max(thumbnailGridView.cellWidth, optimalWidth), maxWidth)
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height: Math.min(Math.max(thumbnailGridView.cellHeight, optimalHeight), maxHeight)
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clip: true
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// simple greedy algorithm
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function calculateColumnCount() {
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// respect screenGeometry
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var c = Math.min(thumbnailGridView.count, maxGridColumnsByWidth);
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var residue = thumbnailGridView.count % c;
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if (residue == 0) {
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gridColumns = c;
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return;
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}
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// start greedy recursion
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gridColumns = columnCountRecursion(c, c, c - residue);
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}
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// step for greedy algorithm
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function columnCountRecursion(prevC, prevBestC, prevDiff) {
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var c = prevC - 1;
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// don't increase vertical extent more than horizontal
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// and don't exceed maxHeight
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if (prevC * prevC <= thumbnailGridView.count + prevDiff ||
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maxHeight < Math.ceil(thumbnailGridView.count / c) * thumbnailGridView.cellHeight) {
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return prevBestC;
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}
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var residue = thumbnailGridView.count % c;
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// halts algorithm at some point
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if (residue == 0) {
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return c;
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}
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// empty slots
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var diff = c - residue;
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// compare it to previous count of empty slots
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if (diff < prevDiff) {
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return columnCountRecursion(c, c, diff);
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} else if (diff == prevDiff) {
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// when it's the same try again, we'll stop early enough thanks to the landscape mode condition
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return columnCountRecursion(c, prevBestC, diff);
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}
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// when we've found a local minimum choose this one (greedy)
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return columnCountRecursion(c, prevBestC, diff);
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}
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property bool mouseEnabled: false
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MouseArea {
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id: mouseDetector
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anchors.fill: parent
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hoverEnabled: true
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onPositionChanged: dialogMainItem.mouseEnabled = true
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}
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// just to get the margin sizes
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PlasmaCore.FrameSvgItem {
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id: hoverItem
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imagePath: "widgets/viewitem"
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prefix: "hover"
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visible: false
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}
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GridView {
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id: thumbnailGridView
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model: tabBox.model
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// interactive: false // Disable drag to scroll
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anchors.fill: parent
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property int captionRowHeight: 22
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property int thumbnailWidth: 300
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property int thumbnailHeight: thumbnailWidth * (1.0/dialogMainItem.screenFactor)
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cellWidth: hoverItem.margins.left + thumbnailWidth + hoverItem.margins.right
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cellHeight: hoverItem.margins.top + captionRowHeight + thumbnailHeight + hoverItem.margins.bottom
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height: cellHeight
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keyNavigationWraps: true
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highlightMoveDuration: 0
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// allow expansion on increasing count
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property int highCount: 0
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onCountChanged: {
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if (highCount < count) {
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dialogMainItem.calculateColumnCount();
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highCount = count;
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}
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}
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delegate: Item {
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width: thumbnailGridView.cellWidth
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height: thumbnailGridView.cellHeight
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MouseArea {
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anchors.fill: parent
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// hoverEnabled: dialogMainItem.mouseEnabled
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// onEntered: parent.hover()
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onClicked: {
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parent.select()
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// dialog.close() // Doesn't end the effects until you release Alt.
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}
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}
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function select() {
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thumbnailGridView.currentIndex = index;
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thumbnailGridView.currentIndexChanged(thumbnailGridView.currentIndex);
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}
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Item {
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z: 0
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anchors.fill: parent
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anchors.leftMargin: hoverItem.margins.left
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anchors.topMargin: hoverItem.margins.top
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anchors.rightMargin: hoverItem.margins.right
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anchors.bottomMargin: hoverItem.margins.bottom
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RowLayout {
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id: captionRow
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anchors.left: parent.left
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anchors.top: parent.top
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anchors.right: parent.right
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height: thumbnailGridView.captionRowHeight
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spacing: 4
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QIconItem {
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id: iconItem
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// source: model.icon
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icon: model.icon
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width: parent.height
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height: parent.height
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state: index == thumbnailGridView.currentIndex ? QIconItem.ActiveState : QIconItem.DefaultState
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}
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PlasmaComponents.Label {
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text: model.caption
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height: parent.height
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// width: parent.width - captionRow.spacing - iconItem.width
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Layout.fillWidth: true
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elide: Text.ElideRight
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}
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PlasmaComponents.ToolButton {
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visible: model.closeable && typeof tabBox.model.close !== 'undefined' || false
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iconSource: 'window-close-symbolic'
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onClicked: {
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tabBox.model.close(index)
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}
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}
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}
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// Cannot draw icon on top of thumbnail.
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KWin.ThumbnailItem {
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wId: windowId
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// clip: true
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// clipTo: thumbnailGridView
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clip: true
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clipTo: parent
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anchors.fill: parent
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anchors.topMargin: captionRow.height
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}
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}
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} // GridView.delegate
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highlight: PlasmaCore.FrameSvgItem {
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id: highlightItem
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imagePath: "widgets/viewitem"
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prefix: "hover"
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}
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// property int selectedIndex: -1
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Connections {
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target: tabBox
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onCurrentIndexChanged: {
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thumbnailGridView.currentIndex = tabBox.currentIndex
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}
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}
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// keyNavigationEnabled: true // Requires: Qt 5.7 and QtQuick 2.? (2.7 didn't work).
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// keyNavigationWraps: true // Requires: Qt 5.7 and QtQuick 2.? (2.7 didn't work).
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} // GridView
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// This doesn't work, nor does keyboard input work on any other tabbox skin (KDE 5.7.4)
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// It does work in the preview however.
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Keys.onPressed: {
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// console.log('keyPressed', event.key)
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if (event.key == Qt.Key_Left) {
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thumbnailGridView.moveCurrentIndexLeft();
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} else if (event.key == Qt.Key_Right) {
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thumbnailGridView.moveCurrentIndexRight();
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} else if (event.key == Qt.Key_Up) {
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thumbnailGridView.moveCurrentIndexUp();
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} else if (event.key == Qt.Key_Down) {
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thumbnailGridView.moveCurrentIndexDown();
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} else {
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return;
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}
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thumbnailGridView.currentIndexChanged(thumbnailGridView.currentIndex);
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}
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} // Dialog.mainItem
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} // Dialog
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}
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